Molecular Orbital Theory IV: Period 2 Homonuclear Diatomic Molecules

[vabyss78]

I was lost and frustrated in class due to my monotone, failure of a professor. Now I have clarity.

Thank you, my friend. There are few gifts one can give more precious than knowledge.

[loget3]

I always wondered how you arrange the molecular orbitals in this energy diagram. Thanks for showing the difference between B-N and O-Ne. Now, where exactly does this difference come from?

[knaanLa]

so where is molecular hybridization comes in

[emilybroadgate]

thankyou so much for this, i've been trying to get my head around it for hours and you explained it so well :)

[afialover2]

Can you tell me how i must begin with chemistry.. I know nothing about chemistry. Thank you afialover2

[bilperli]

This is exactly the kind of clarity I have been searching for. Much appreciated.

[onfiyahh]

I wished you taught at my school...

[robie93]

19:20

[xgoddammitx]

This is a pretty good video, though could you explain why O2 F2 and Ne2 have σ2p as the lowest energy orbital instead of π2p? Or better yet, why does B2 C2 and N2 have π2p as the lowest energy?

[LillyLilLette17]

Thank you for all your help! Can you explain how to do the MO diagram for if the molecule is negative or positive; ie: N2- and N2+

[foghorn200]

@LillyLilLette17 Well N2 has 14 Electrons. So N2- would have 15 total Electrons and N2+ would have 13 Total electrons. Then just follow the same steps. Hope that helps

[stop08it]

OMG if you were in front of me right now, i'd get on one knee and ask you to marry me. Thanks so much!

[josskirk]

ChemAssistBeta : yeah, thanks, that helps. (:

[madamefoster23]

And why does it switch at O2?

[madamefoster23]

Why is the pi bond weaker than the sigma bond?

[NOZUMI800]

How do you do for heteronuclear MO's?

[josskirk]

question for the uploader: if the pi bond is less energetic for the C, N, and B, is it incorrect to say that in the diatomic molecule it is the pi orbital which forms the 'double' bond, when it's lower energy?

[ChemAssistBeta]

@josskirk I'm afraid I don't understand the question. Could you re-phrase it?

[josskirk]

@ChemAssistBeta in a double bond, the first bond is often called the sigma bond and the second bond is called the pi bond. But if for oxygen, for example, the 2p pi is less energetic than the 2p sigma, then shouldn't the first bond be called the pi and the second bond be called the sigma bond, for that example anyway?

[ChemAssistBeta]

@josskirk I think you're confusing molecular orbital theory with valence bond theory. Sigma and pi bonds are terms used in valence bond theory to describe overlap of isolated orbitals. The orbitals overlap, but each atom essentially has its own individual orbital.  In molecular orbital theory, the orbitals belong to the WHOLE molecule, not to the individual atoms that make up the molecule. Is that a good answer?

[geyn]

Its all so much clearer now THANK YOU! AND HUGS!

[fortis4eva]

Wow.. I learned something today

[ScatteredShadow]

your DA BEST. Class sizes are huge so I can never listen in class to grasp the concept, especially when the seats I score are mainly in the back rows. You have officially saved me from failing first year chemistry. Forreal. You the boss

[cokeownz1]

Amazing videos (:

[EthicaNicomachea]

you're awesome

[oohfajitasoo]

You don't even know how much of a help you have been to me! Thank you a million!! Just when I wanted to give up, you came along and explained it in a way that was easy to understand!!

[johpale]

Thank you very much for your series of videos concerning MO Theory: they are easy to understand, thorough, and very informative. The best compliment I can give is that I was able to learned something from them.